Blazon: Per fess, I per pale argent a cross of Santiago gules and azure a croizer in bend surmounted by a mitre or, II of the last a walled town of the third, pointé in base of the first two bars wavy of the third
Unfortunately, I can’t find any information about these arms, but it’s pretty obvious to me that the base half is canting arms – the name translates to “new town on the river,” and bars wavy are a very traditional method of representing water or rivers. The Order of Santiago did control the town from around 1213 through 1243, which would explain the cross. I’m not entirely sure about the episcopal regalia; it does seem like a bishopric was established in the area under the Visigoths, but I’m not entirely certain about that.
Blazon: Per pale vert a tower or windowed azure and of the last a cross of Santiago gules fimbriated argent, pointé in base of the fourth a bunch of grapes of the second slipped of the first
The tower is a reference to Torre de Vejezate, a local abandoned town. The cross of Santiago reflects the fact that the land previously belonged to the Order of Santiago, and the grapes refer to the traditional industry of winemaking.
Blazon: Per pale azure a representation of the local church of Christ of the Valley argent and of the last a cross of Santiago gules, pointé in base or a bunch of grapes slipped and leaved vert
The characteristic church featured on the arms was built in the sixteenth century on the site of the former hermitage of St. Helena, where (according to legend) Christ appeared in the form of a strange traveler.
Blazon: Per pale argent a pall gules and of the last, a Maltese cross of the first, pointé in base barry wavy of the first and azure
Although Ruidera fell into the territory of the Order of Santiago (per a 1237 treaty), it ultimately ended up as the property of the Order of St. John in 1783, which is probably the source for the Maltese cross. There are also many lagoons and wetlands in the area under national protection, which may be the source of the barry wavy point.
Blazon: Per pale argent a cross of Santiago gules and azure a castle triple-towered or on a mount in base proper, surmounted in base by a basin argent of water barry wavy of the field and the last; pointé in base or a galero vert, in the fess point an alms bag, in base a croizer and a patriarchal cross in saltire sable
The archbishop’s regalia in base is presumably a reference to St. Thomas of Villanova, who was born in Fuenllana in 1488, and later canonized in 1658.